JP2009121777A - Pressurized fluidized incineration equipment and starting operation method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce equipment costs and running costs by improving efficiency in a starting operation of pressurized fluidized incineration equipment. <P>SOLUTION: This pressurized fluidized incineration equipment includes a pressurized fluidized furnace 10 for burning a treated object S, and a supercharger 40 having a turbine 41 driven by an exhaust gas generated by the combustion, and a compressor 42 driven by the turbine 41 and compressing the air supplied into the pressurized fluidized furnace 10. Further it includes passages 78, 79 for allowing the air from the air supply means 43 facing the compressor 42 to pass through the compressor 42 to supply the compressed air into the pressurized fluidized furnace 10, a main passage 73 for supplying the exhaust gas to the turbine 41 of the supercharger 40 through an air preheater 20 and a dust collector 30, and a bypass passage 73A for supplying the exhaust gas passing through the air preheater 20 and the dust collector 30, to an exhaust gas treatment system 74 at the downstream without passing through the supercharger 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pressurized fluidized incineration facility and a startup method of the pressurized fluidized incineration facility, and more specifically, includes a turbine driven by fluidized combustion under pressure and driven by exhaust gas generated by the combustion, The present invention relates to a pressurized fluidized incineration facility and a startup operation method of a pressurized fluidized incineration facility configured to drive a compressor by a turbine and supply air compressed by the driving of the compressor into a pressurized fluidized furnace.

In a pressurized fluidized furnace, a pressurized fluidized bed combined power plant that uses coal as fuel has been put into practical use. Normally, at the time of start-up, the turbocharger of the turbine is used as an electric motor to start up to a predetermined pressure and temperature. . Here, in a system using a supercharger, since the supercharger cannot be used as a blower at the time of start-up, a large-capacity start-up blower is often used.
On the other hand, the present applicant has disclosed Patent Document 1 as a method of effectively using the exhaust gas (exhaust gas) of a gas turbine. However, Patent Document 1 does not disclose the startup operation of the fluidized incineration facility.
However, the present applicant has proposed Patent Document 2 as a device for starting up the pressurized fluidized incineration facility. However, it does not disclose where the combustion air for the start burner in the start-up operation about once or twice per year is brought from. In this regard, according to the normal idea of those skilled in the art, the combustion air for the starting burner is supplied from a dedicated blower provided exclusively.
However, the provision of a dedicated blower only for start-up operation about once or twice a year (at most several times) causes a surge in equipment. In particular, it is not possible to avoid an increase in the size of the dedicated blower by sending combustion air to the pressurized fluidized furnace having a large capacity by a dedicated blower until the pressurized fluidized furnace reaches a stable operation in a predetermined pressurized state. Is. In addition, it is desired to further increase the efficiency of the startup operation of the pressurized fluidized incineration facility.
JP-A-9-89232 JP 2007-170704 A

  The main problem to be solved by the present invention is to improve the efficiency at the time of start-up operation of the pressurized fluidized incineration facility and to reduce the equipment cost and the running cost. Another problem is to reduce the facility cost and running cost by not using or reducing the size of the combustion air supply blower of the start burner.

The present invention that has solved this problem is as follows.
<Invention of Claim 1>
A pressurized fluidizing furnace for fluidizing and burning a workpiece under pressure, a turbine driven by exhaust gas generated by the combustion, and a compressor for compressing air driven by the turbine and supplied to the pressurized fluidizing furnace. A pressurized fluidized incineration facility comprising a feeder,
A path for supplying compressed air into the pressurized fluidized furnace through the compressor and air from an air supply means provided for the compressor, and the exhaust gas to the turbocharger turbine through an air preheater and a dust collector. A main path for supplying, and a bypass path for supplying the exhaust gas to the exhaust gas treatment system downstream of the supercharger without passing through the supercharger after the exhaust gas has passed through the air preheater and the dust collector,
When starting up the pressurized fluidized furnace, the air from the air supply means was supplied as compressed air into the pressurized fluidized furnace through the compressor, and the exhaust gas passed through the air preheater and the dust collector. It was configured to pass through the main route and the bypass route later,
A pressurized fluidized incineration facility characterized by that.

<Invention of Claim 2>
A pressurized fluidizing furnace for fluidizing and burning a workpiece under pressure, a turbine driven by exhaust gas generated by the combustion, and a compressor for compressing air driven by the turbine and supplied to the pressurized fluidizing furnace. A pressurized fluidized incineration facility comprising a feeder,
The air from the air supply means provided for the compressor is branched from a path for supplying compressed air through the compressor and into the pressurized fluidized furnace, and a path after passing through the compressor in this path, A branch path connected to the starter burner of the pressurized fluidized furnace, a main path for supplying the exhaust gas to the turbine of the supercharger through an air preheater and a dust collector, and the exhaust gas passed through the air preheater and the dust collector A bypass path for supplying an exhaust gas treatment system downstream of the supercharger without passing through the supercharger later,
When starting up the pressurized fluidized furnace, the air from the air supply means is supplied as compressed air into the pressurized fluidized furnace through the compressor, and the compressed air is supplied to the startup through the branch path. Supply as burner combustion air,
Furthermore, the exhaust gas is configured to pass through the main path and the bypass path after passing through the air preheater and the dust collector.
A pressurized fluidized incineration facility characterized by that.

<Invention of Claim 3>
Separately, the pressurized fluidized incineration equipment according to claim 1 or 2, wherein the combustion air supply blower for the start burner is not provided.

<Invention of Claim 4>
A pressurized fluidizing furnace for fluidizing and burning a workpiece under pressure, a turbine driven by exhaust gas generated by the combustion, and a compressor for compressing air driven by the turbine and supplied to the pressurized fluidizing furnace. In the start-up operation in a pressurized fluidized incineration facility equipped with a feeder,
Supplying air from an air supply means provided for the compressor as compressed air through a path for supplying compressed air into the pressurized fluidized furnace through the compressor;
The exhaust gas is passed through an air preheater and a dust collector and then passed through a main path that leads directly to the turbocharger turbine and a bypass path that leads to a downstream exhaust gas treatment system without passing through the supercharger.
A start-up operation method for a pressurized fluidized incinerator.

<Invention of Claim 5>
A pressurized fluidizing furnace for fluidizing and burning a workpiece under pressure, a turbine driven by exhaust gas generated by the combustion, and a compressor for compressing air driven by the turbine and supplied to the pressurized fluidizing furnace. In the start-up operation in a pressurized fluidized incineration facility equipped with a feeder,
The air from the air supply means provided for the compressor is branched from a path for supplying compressed air through the compressor into the pressurized fluidized furnace and a path after passing through the compressor in the path, and While supplying compressed air through a branch path connected to the start-up burner of the pressurized fluidized furnace,
The exhaust gas is passed through an air preheater and a dust collector and then passed through a main path that leads directly to the turbocharger turbine and a bypass path that leads to a downstream exhaust gas treatment system without passing through the supercharger.
A start-up operation method for a pressurized fluidized incinerator.

<Invention of Claim 6>
Until the temperature and pressure in the pressurized fluidized furnace or in the supercharger reach predetermined values, only a part of the amount of fluidized medium necessary for stable operation is charged in the pressurized fluidized furnace. Fluidization is performed by air supply means, and when the temperature and pressure in the pressurized fluidized furnace or the supercharger reach predetermined values, the air supply means is stopped, and then the flow required for stable operation. The start-up operation method of the pressurized fluidized incinerator according to claim 4 or 5, wherein an additional amount of medium is added.

(Main effects)
As mentioned earlier, preparing a dedicated blower to send combustion air for the starter burner only for start-up operations about once or twice a year (at most several times) , Soaring equipment. In particular, it is not possible to avoid an increase in the size of the dedicated blower by sending combustion air to the pressurized fluidized furnace having a large capacity by a dedicated blower until the pressurized fluidized furnace reaches a stable operation in a predetermined pressurized state. Is.
To further explain the latter point, the pressure of the pressurized fluidized furnace at the start-up is a low pressure, but the pressure in the furnace needs to be increased to a pressure necessary for steady operation with the passage of time. For this reason, the dedicated blower needs to have a capacity in advance in order to secure high discharge pressure and high airflow after the passage of time from the initial low discharge pressure and low airflow. Cannot be avoided.
However, in the present invention, a path for supplying compressed air into the pressurized fluidized furnace through the compressor from the air supply means provided for the compressor, and preferably a path after passing through the compressor in this path. And a branch path connected to the start-up burner of the pressurized fluidized furnace, and when starting up the pressurized fluidized furnace, the compressed air is started through the branch path (in addition to the pressurized fluidized furnace). It is supplied as combustion air.

  As a result, the temperature rises as the combustion progresses over time, and as a result, when the pressure in the pressurized flow furnace rises, the compression ratio on the compressor side increases and the compressed air pressure on the compressor outlet side increases. Since the pressure is always higher than the pressure in the pressurized fluidized furnace (pressure exceeding the pressure loss of the fluidized part in the pressurized fluidized furnace), the air volume on the compressor outlet side increases as the pressure in the pressurized fluidized furnace increases. As a result, even if the air supply means has a small blowing capacity, a high discharge pressure and a high blowing volume can be ensured even after a lapse of time. Accordingly, a dedicated blower is not used to send the combustion air for the starter burner assumed as the reference numeral 43A in FIG. 1, or an extremely small one is sufficient, thereby reducing the equipment cost and running cost. Can be made. In addition, since the pressure in the pressurized fluidized furnace and the pressure of the compressed air that is blown into the pressurized fluidized furnace as the combustion air are linked, there is also an advantage that it is easy to control the amount of combustion air in the starter burner.

However, even during start-up operation, the amount of exhaust gas from the pressurized fluidized furnace is initially very small. Therefore, if the exhaust gas is directly guided to the turbocharger turbine after passing through the air preheater and the dust collector, the turbine pressure loss is caused and the static pressure of the air supply means is increased. Therefore, in addition to this route that leads exhaust gas directly to the turbocharger turbine after passing through the air preheater and dust collector, it has a bypass route that leads to the downstream exhaust gas treatment system without passing through the turbocharger. After passing through the preheater and the dust collector, the main path and the bypass path are configured to pass. Thereby, the pressure loss by a turbine can be reduced and the static pressure of an air supply means can be reduced, an air supply means can be reduced in size and an installation cost and a running cost can be reduced.
On the other hand, the absence of the combustion air supply blower for the start burner has a great effect of reducing the equipment cost.

  Note that the air supply means in the present specification may be a single device such as an air compressor or a blower, an apparatus provided in other equipment and supplying air generated in the other equipment to a compressor, etc. Is appropriately selected.

  According to the present invention, the efficiency of the startup operation of the pressurized fluidized incineration facility can be improved, and the equipment cost and running cost can be reduced.

Embodiments of the present invention will be described below.
The pressurized fluidized incineration facility according to this embodiment includes a pressurized fluidized furnace 10 that combusts the workpiece S, a turbine 41 that is driven by exhaust gas generated by the combustion, and the turbine 41 that is driven by the exhaust gas. A supercharger 40 having a compressor 42 for compressing air to be supplied therein is provided.

  The pressurized fluidized furnace 10 is supplied with an object to be treated S such as biomass, dewatered cake of municipal waste or sewage sludge from the supply port, and at the time of start-up, fuel and combustion for combustion from the lower starter burner 12 Service air is supplied. As will be described later, compressed air is blown from the lower part of the pressurized fluidized furnace 10, and the workpiece S is fluidized by the fluidizing energy, and is combusted and incinerated.

  The combustion incineration exhaust gas is sent to the air preheater 20 through the flow path 71, then passes through the dust collector 30 such as a bag filter or a ceramic filter through the flow path 72, and then passes through the flow path 73 that is the main path of the supercharger 40. The gas is guided to the turbine 41, and is guided to the flow path 74 which is the downstream exhaust gas treatment system without passing through the supercharger 40 through the flow path 73A which branches from the flow path 73 which is a bypass path. Thus, by having the flow path 73A as a bypass path, the pressure loss due to the turbine 41 can be reduced and the static pressure of the air supply means 43 can be reduced, the air supply means 43 can be downsized, and the equipment cost and running can be reduced. Cost can be reduced. In particular, at the beginning of start-up operation, the amount of exhaust gas from the pressurized fluidized furnace 10 is extremely small, so that the turbine pressure loss is likely to increase. Therefore, the amount of exhaust gas passing through the flow path 73 as the main path is reduced, It is preferable to increase the amount of exhaust gas passing through the flow path 73A serving as the bypass path and increasing the amount of exhaust gas passing through the flow path 73 serving as the main path as the amount of exhaust gas increases. The adjustment of the amount of exhaust gas guided to the flow path 73 and the amount of exhaust gas guided to the flow path 73A can be performed by adjusting the opening degree of the switching valves 46 and 47 provided in the respective flow paths 73 and 73A. .

  On the other hand, the supercharger 40 drives the turbine 41 and drives the compressor 42 connected thereto. The exhaust gas expanded by the turbine 41 passes through the flow path 74 through the white smoke prevention preheater 50, is guided to the flue gas treatment tower 60 through the flow path 75, and is discharged from the chimney 62 to the atmosphere after being cleaned. .

On the other hand, air supply means 43 is provided for the compressor 42, and the air from the flow path 76 having the switching valve 44 is compressed by the compressor 42, passes through the flow path 77 and the flow path 78, and is an air preheater. A path for supplying compressed air into the pressurized fluidized furnace 10 is formed through the flow path 79 while going around 20.
Further, a branch path 80 branched from the path 77 after passing through the compressor 42 in this path and continuing to the starting burner 12 of the pressurized fluidized furnace 10 is also formed.
The air preheater 20 is for preheating the compressed air supplied into the pressurized fluidized furnace 10 with the heat of the exhaust gas.
The white smoke prevention preheater 50 preheats the air sent from the white smoke prevention fan 52 and heats the clean air from the smoke treatment tower 60 in the chimney 62 so that white smoke is not generated in the atmosphere. is there. The flue gas treatment tower 60 is intended to finally clean the exhaust gas, and employs a wet dust collection system or the like.

  In the present embodiment, a supply flow path 81 having a switching valve 45 for the external air A to the compressor 42 is provided from around the equipment, and air is sent from the air supply means 43 to the compressor 42 during the start-up operation, so that stable operation is achieved. At that time, the switching valve 44 is closed, and instead, the switching valve 45 is opened, and the external air A is sent to the compressor 42 through the supply flow path 81.

  In the start-up operation, as shown in FIG. 2, the air from the air supply means 43 provided for the compressor 42 is sent to the compressor 42 through the flow path 76 (the air supply means operation starts), and the compressor 42 The compressed air is supplied as compressed air through the flow path 77 and the flow path 78, through the flow path 79 while circulating around the air preheater 20. Further, the compressed air is sent to the starting burner 12 of the pressurized fluidized furnace 10 through the branch path 80 branched from the path 77 after passing through the compressor 42 in this path, and supplied as combustion air.

  When the pressure in the pressurized fluidized furnace 10 rises with the rising operation time, the compression ratio on the compressor side increases, and the compressed air pressure on the outlet side of the compressor 42 is always higher than the pressure in the pressurized fluidized furnace 10. Since it becomes higher (pressure exceeding the pressure loss of the fluidized part in the pressurized fluidized furnace 10), the air volume at the outlet side of the compressor 42 increases as the pressure in the pressurized fluidized furnace 10 increases. As a result, even with the air supply means 43 having a small capacity, it is possible to ensure a high discharge pressure and a high air blowing amount even after the passage of time. Accordingly, a dedicated blower is not used to send the combustion air for the starter burner 12 hypothetically shown as reference numeral 43A in FIG. 1, or an extremely small one is sufficient, thereby reducing equipment costs and running costs. Can be reduced.

  When the stable operation is performed with the predetermined temperature, the inlet temperature of the turbine 41 being, for example, 350 ° C. or more, and the pressure being 0.11 to 0.15 MPa as an index, the switching valve 44 is closed (air supply means operation stopped). Instead, the switching valve 45 is opened, and the external air A is sent to the compressor 42 from around the equipment through the supply flow path 81. Thereafter, this condition continues.

  Conventionally, in a bubbling flow furnace used for incineration that does not perform pressurization, it is necessary to continuously operate a flow blower and to install an induction fan for forcibly exhausting from the chimney in the flue gas treatment tower 60 On the other hand, the pressurized fluidized incineration facility according to the present embodiment has an advantage that the running cost is reduced because only the air supply means 43 is used at the time of startup, and the installation of the induction fan is unnecessary.

  Although there are no limitations on the operating conditions of the pressurized fluidized furnace 10, it is desirable to set the pressure to about 0.1 to 0.3 MPa and to set the temperature to about 800 to 850 ° C. from the viewpoint of preventing dioxin generation.

  By the way, in the process from the above rising to the stable operation, as shown in FIG. 2, at the beginning of the start-up, the operation of the air supply means 43 is started, and the amount of fluid medium such as sand necessary for the stable operation is increased. Fluidization is performed by the air supply means 43 in a state where only the part is put into the pressurized fluidized furnace 10, and when the temperature and pressure in the pressurized fluidized furnace 10 or the supercharger 40 reach predetermined values, the air is supplied. The means 43 is stopped, and then an additional amount of fluid medium necessary for stable operation is added. By reducing the amount of the fluid medium at the start-up in this way, the pressure loss in the fluidized part of the pressurized fluidized furnace 10 is reduced, and the pressure loss of the exhaust gas at the inlet of the turbine 41 is also reduced in the fluidized part. Increase by reduced amount. As a result, the pressure increase speed of the compressed air at the outlet of the compressor 42 also increases, so that the air supply means 43 can be further downsized. In addition, when passing the exhaust gas from the pressurized fluidized furnace 10 through the flow path 73A which is a bypass path, there are few advantages by reducing the pressure loss in a fluidized part. However, even if the exhaust gas from the pressurized fluidized furnace 10 does not pass through the flow path 73A that is the bypass path, and passes through the flow path 73 that is the main path, it still does not reach the stable operation stage, and the air supply means 43 The driving state continues. Therefore, if the pressure loss in the fluidized part is reduced, a great advantage is exhibited from this stage.

Next, a mode in which a fluid medium such as sand is supplied into the pressurized fluidized furnace 10 or extracted from the pressurized fluidized furnace 10 will be described.
First, in the present embodiment, a fluidized medium feeding device 11 for feeding a fluidized medium into the pressurized fluidized furnace 10 and a fluid for discharging the fluidized medium out of the pressurized fluidized furnace 10 in the pressurized fluidized furnace 10. A medium discharge device 13. The fluid medium charging device 11 includes a storage hopper 11A that stores the fluid medium, and a charging means 11B that includes a rotary valve, a slide gate, and the like provided below the storage hopper 11A. The inside fluid medium is supplied into the pressurized fluidized furnace 10 by the charging means 11B, for example, through the side wall of the pressurized fluidized furnace 10. On the other hand, the fluid medium discharge device 13 conveys the fluid gate discharged through the discharge gate 13A provided at the bottom of the pressurized flow furnace 10 and the discharge gate 13A to a predetermined temperature (for example, 150 to 250 ° C.). Cooling conveyor 13B for cooling, separation means 13C such as a classifier (sieving machine) for removing impurities such as incombustibles contained in the fluid medium cooled by this cooling conveyor 13B, and impurities are removed by this separation means 13C Transporting means 13D such as a flight conveyor for transporting the reusable fluid medium to the storage hopper 11A. Reference numeral 13E denotes a container for collecting and transporting impurities such as incombustibles. Thus, in this embodiment, the fluid medium input device 11 and the fluid medium discharge device 13 are provided, and the fluid medium can be recycled.

  In this embodiment, the amount of the fluid medium such as sand is not particularly limited. For example, when starting up after the end of the steady operation, the pressure loss in the pressurized fluidized furnace 10 is, for example, 0.005 to 0.007 MPa. As described above, the fluid medium in the pressurized fluidized furnace 10 is discharged by the fluid medium discharge device 13 to adjust the amount of the fluid medium. At this time or after this adjustment, compressed air is supplied into the pressurized fluidized furnace 10. Thereafter, for example, when the inside of the pressurized fluidized furnace 10 reaches a predetermined temperature and pressure, the pressure loss in the pressurized fluidized furnace 10 is, for example, 0.01 to 0.015 MPa. The fluid medium is introduced into the fluid by the fluid medium feeder 11. The determination of the timing of adding (adding) the fluid medium is not limited to the pressure and temperature in the pressurized fluidized furnace 10, and may be based on, for example, the supplied compressed air pressure. it can.

It is explanatory drawing of the structural example of a pressurization fluidization incineration equipment. It is a flowchart for demonstrating the start-up operation method of a pressurized fluidized incinerator.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Pressurized flow furnace, 11 ... Fluid medium charging device, 12 ... Starter burner, 13 ... Fluid medium discharge device, 20 ... Air preheater, 30 ... Dust collector, 40 ... Supercharger, 41 ... Turbine, 42 ... Compressor , 43... Blower for starting, 50... Preheater for preventing white smoke, 60.

Claims (6)

A pressurized fluidizing furnace for fluidizing and burning a workpiece under pressure, a turbine driven by exhaust gas generated by the combustion, and a compressor for compressing air driven by the turbine and supplied to the pressurized fluidizing furnace. A pressurized fluidized incineration facility comprising a feeder,
A path for supplying compressed air into the pressurized fluidized furnace through the compressor and air from an air supply means provided for the compressor, and the exhaust gas to the turbocharger turbine through an air preheater and a dust collector. A main path for supplying, and a bypass path for supplying the exhaust gas to the exhaust gas treatment system downstream of the supercharger without passing through the supercharger after the exhaust gas has passed through the air preheater and the dust collector,
When starting up the pressurized fluidized furnace, the air from the air supply means was supplied as compressed air into the pressurized fluidized furnace through the compressor, and the exhaust gas passed through the air preheater and the dust collector. It was configured to pass through the main route and the bypass route later,
A pressurized fluidized incineration facility characterized by that. A pressurized fluidizing furnace for fluidizing and burning a workpiece under pressure, a turbine driven by exhaust gas generated by the combustion, and a compressor for compressing air driven by the turbine and supplied to the pressurized fluidizing furnace. A pressurized fluidized incineration facility comprising a feeder,
The air from the air supply means provided for the compressor is branched from a path for supplying compressed air through the compressor and into the pressurized fluidized furnace, and a path after passing through the compressor in this path, A branch path connected to the starter burner of the pressurized fluidized furnace, a main path for supplying the exhaust gas to the turbine of the supercharger through an air preheater and a dust collector, and the exhaust gas passed through the air preheater and the dust collector A bypass path for supplying an exhaust gas treatment system downstream of the supercharger without passing through the supercharger later,
When starting up the pressurized fluidized furnace, the air from the air supply means is supplied as compressed air into the pressurized fluidized furnace through the compressor, and the compressed air is supplied to the startup through the branch path. Supply as burner combustion air,
Furthermore, the exhaust gas is configured to pass through the main path and the bypass path after passing through the air preheater and the dust collector.
A pressurized fluidized incineration facility characterized by that.   Separately, the pressurized fluidized incineration equipment according to claim 1 or 2, wherein the combustion air supply blower for the start burner is not provided. A pressurized fluidizing furnace for fluidizing and burning a workpiece under pressure, a turbine driven by exhaust gas generated by the combustion, and a compressor for compressing air driven by the turbine and supplied to the pressurized fluidizing furnace. In the start-up operation in a pressurized fluidized incineration facility equipped with a feeder,
Supplying air from an air supply means provided for the compressor as compressed air through a path for supplying compressed air into the pressurized fluidized furnace through the compressor;
The exhaust gas is passed through an air preheater and a dust collector and then passed through a main path that leads directly to the turbocharger turbine and a bypass path that leads to a downstream exhaust gas treatment system without passing through the supercharger.
A start-up operation method for a pressurized fluidized incinerator. A pressurized fluidizing furnace for fluidizing and burning a workpiece under pressure, a turbine driven by exhaust gas generated by the combustion, and a compressor for compressing air driven by the turbine and supplied to the pressurized fluidizing furnace. In the start-up operation in a pressurized fluidized incineration facility equipped with a feeder,
The air from the air supply means provided for the compressor is branched from a path for supplying compressed air through the compressor into the pressurized fluidized furnace and a path after passing through the compressor in the path, and While supplying compressed air through a branch path connected to the start-up burner of the pressurized fluidized furnace,
The exhaust gas is passed through an air preheater and a dust collector and then passed through a main path that leads directly to the turbocharger turbine and a bypass path that leads to a downstream exhaust gas treatment system without passing through the supercharger.
A start-up operation method for a pressurized fluidized incinerator.   Until the temperature and pressure in the pressurized fluidized furnace or in the supercharger reach predetermined values, only a part of the amount of fluidized medium necessary for stable operation is charged in the pressurized fluidized furnace. Fluidization is performed by air supply means, and when the temperature and pressure in the pressurized fluidized furnace or the supercharger reach predetermined values, the air supply means is stopped, and then the flow required for stable operation. The start-up operation method of the pressurized fluidized incinerator according to claim 4 or 5, wherein an additional amount of medium is added.

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